ATTCH 6 Monday Lick Specs.pdf

MONDAY LICK TRAIL SYSTEM – PROJECT SPECIFICATIONS

SECTION 011000 - SUMMARY

SECTION 012100 - ALLOWANCES

SECTION 012200 - UNIT PRICES

SECTION 017100 - WEED AND DISEASE PREVENTION

011000 - SUMMARY

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SECTION 011000 - SUMMARY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Project information.

2. Work covered by Contract Documents.

3. Work under separate contracts.

4. Contractor's use of site and premises.

5. Coordination with occupants.

6. Work restrictions.

7. Specification and Drawing conventions.

1.2 PROJECT INFORMATION

A. Project Identification: Monday Lick Trail System.

1. Project Location: Marlinton, WV

1.3 WORK COVERED BY CONTRACT DOCUMENTS

A. The Work of Project is defined by the Contract Documents and consists of the following:

1. The overall project shall consist of the installation of approximately 27 miles of shared use trails. The trails have been laid out and flagged in the field by IMBA and shall be used as the flag line corridor for basis of construction. There shall be trails for beginner (green), more difficult (blue), and most difficult (black) to be included in the project. Smaller task orders shall be issued to make up the total project. The contractor shall be responsible for all labor, materials, permits coordination as well as other Work indicated in the Contract Documents for awarded task orders/phases for the project.

a. The contractor shall also provide proof of performance bond for task order amount, with submission of RFP documentation.

b. Contractor shall provide in writing that at least one team leader and/or lead operator who has constructed at least five (5) miles of similar shared-use natural surface trail during the past five (5) years who is available onsite during all work activities.

Contractor shall also include, in writing, the amount of time the above referenced team leader(s) has been with the crew and the similar projects that they have worked

on. If at any time the team leader/operator should be replaced, submit notice to COR in writing to provide equivalent replacement employee.

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1.4 WORK UNDER SEPARATE CONTRACTS/TASK ORDERS

A. General: Cooperate fully with separate contractors so work on those task orders may be carried out smoothly, without interfering with or delaying Work under this Contract/task order or other contracts/task orders. Coordinate the Work of this Contract/task order with work performed under separate contracts/task orders.

B. Concurrent Work: Owner will award separate contracts/task orders for the following construction operations at Project site. Those operations will be conducted simultaneously with work under this Contract/Task Order.

1.5 CONTRACTOR'S USE OF SITE AND PREMISES

A. Limits on Use of Site: Limit use of Project site to areas within the Contract limits indicated in the NEPA CE document (within 75’ of flagged line). Do not disturb portions of Project site beyond areas in which the Work is indicated.

1. Limits on Use of Site: Confine construction operations to necessary haul/travel routes, and trail segments to be constructed under task orders or contracts awarded to contactor.

2. Driveways, Walkways, and Entrances: Keep driveways and entrances serving premises clear and available to Owner, Owner's employees, and emergency vehicles at all times. Do not use these areas for parking or for storage of materials. Parking and material staging areas must be approved by the COR.

B. Condition of Existing Grounds: Maintain portions of existing grounds, landscaping, and hardscaping affected by construction operations throughout construction period. Repair damage caused by construction operations. Work shall be minimized to the extent necessary, as shown in the standard details.

1.6 COORDINATION WITH OCCUPANTS

A. Partial Owner Occupancy: Owner may choose to open adjacent trail segments as they are completed. Cooperate with COR during construction operations to minimize conflicts and facilitate Owner usage. Perform the Work so as not to interfere with Owner's operations. Maintain existing exits unless otherwise indicated.

B. Owner Limited Occupancy of Completed Areas of Construction: Owner reserves the right to occupy and to place and install equipment in completed portions of the Work, prior to Substantial Completion of the Work, provided such occupancy does not interfere with completion of the Work. Such placement of equipment and limited occupancy shall not constitute acceptance of the total Work.

1.7 WORK RESTRICTIONS

A. Comply with restrictions on construction operations.

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1. Comply with limitations on use of public streets, work on public streets, rights of way, and other requirements of authorities having jurisdiction.

B. Smoking and Controlled Substance Restrictions: Use of tobacco products, alcoholic beverages, and other controlled substances on Owner's property is not permitted.

C. The Government has the authority to cease construction operations as deemed necessary to protect and/or preserve any historical, biological, or ecological resources that may be at risk by reason of the construction activities, based on findings discovered beyond the original NEPA investigations. Reference attached NEPA documentation. Any cessation of work shall be at no additional cost to the government, but may be grounds for COR to approve additional mobilization.

1.8 SPECIFICATION AND DRAWING CONVENTIONS

A. Specification Content: The Specifications use certain conventions for the style of language and the intended meaning of certain terms, words, and phrases when used in particular situations.

These conventions are as follows:

1. Imperative mood and streamlined language are generally used in the Specifications. The words "shall," "shall be," or "shall comply with," depending on the context, are implied where a colon (:) is used within a sentence or phrase.

2. Text Color: Text used in the Specifications, including units of measure, manufacturer and product names, and other text may appear in multiple colors or underlined as part of a hyperlink; no emphasis is implied by text with these characteristics.

3. Hypertext: Text used in the Specifications may contain hyperlinks. Hyperlinks may allow for access to linked information that is not residing in the Specifications. Unless otherwise indicated, linked information is not part of the Contract Documents.

4. Specification requirements are to be performed by Contractor unless specifically stated otherwise.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 NEPA Investigations have designated approximately one third of the project zone (HPZ) for the Rusty Patch Bumblebee (RPBB). For segments located in this HPZ, construction activities may

011000 - Monday Lick Trail System PAGE 4 OF 18 only take place between May 15 - September 30. Please reference project map for areas restricted to this build window.

3.2 Further timeline restrictions apply to tree cutting/clearing on trees greater than 5 inches DBH inclusive to the scope of the entire project. Trees greater than 5 inches DBH may not be cut during Northern Long Eared Bat (NLEB) activity period (April 1 – November 14).

END OF SECTION 011000

012100 - ALLOWANCES

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SECTION 012100 - ALLOWANCES

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes administrative and procedural requirements governing allowances.

B. Types of allowances include the following:

1. Quantity allowances.

C. Related Requirements:

1. Section 012200 "Unit Prices" for procedures for using unit prices, including adjustment of quantity allowances when applicable.

1.2 SELECTION AND PURCHASE

A. At the earliest practical date after award of the Contract, advise COR of the pay items that allowances may be exceeded.

B. Written permission from the CO must be obtained in order to receive payment for any item allowances exceeded.

1.3 QUANTITY ALLOWANCES

A. Allowance shall include estimated quantity of pay items based on field conditions at time of survey.

1.4 ADJUSTMENT OF ALLOWANCES

A. Allowance Adjustment: To adjust allowance amounts, prepare a Change Order proposal based on the difference between purchase amount and the allowance, multiplied by final measurement of work-in-place where applicable. If applicable, include reasonable allowances for cutting losses, tolerances, and similar margins.

1. If requested, prepare explanation and documentation to substantiate distribution of overhead costs and other markups.

2. Submit substantiation of a change in scope of Work, if any, claimed in Change Orders related to unit-cost allowances.

3. Owner reserves the right to establish the quantity of work-in-place by independent quantity survey, measure, or count.

012100 - ALLOWANCES

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PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 SCHEDULE OF ALLOWANCES

A. Allowance No. 1: Quantity Allowance: Include the amount of trail construction (Green, Blue Type 1, Blue Type 2, Black Type 1, Black Type 2), Riprap Surfacing, Platform Turns, Climbing Turns (In-sloped Turns), Retaining Wall, Jute Fiber Log, and Riprap Energy Dissipator as noted in the pay items table provided in the solicitation to be the quantity allowance for this pay item.

1. Coordinate quantity allowance adjustment with unit-price requirements in Section 012200 "Unit Prices."

END OF SECTION 012100

012200 - UNIT PRICES

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SECTION 012200 - UNIT PRICES

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes administrative and procedural requirements for unit prices.

B. Related Requirements:

1. Section 012100 "Allowances" for procedures for using unit prices to adjust quantity allowances.

1.2 DEFINITIONS

A. Unit price is an amount incorporated into the Agreement (based on bid prices on pay items as advertised on the solicitation), applicable during the duration of the Work as a price per unit of measurement for materials, equipment, or services, or a portion of the Work, added to or deducted from the Contract Sum by appropriate modification, if the scope of Work or estimated quantities of Work required by the Contract Documents are increased or decreased.

1.3 PROCEDURES

A. Unit prices include all necessary material, plus cost for delivery, installation, insurance, applicable taxes, overhead, and profit.

B. Measurement and Payment: See individual Specification Sections for work that requires establishment of unit prices. Methods of measurement and payment for unit prices are specified in those Sections.

C. Owner reserves the right to reject Contractor's measurement of work-in-place that involves use of established unit prices and to have this work measured, at Owner's expense, by an independent surveyor acceptable to Contractor.

D. List of Unit Prices: A schedule of unit prices is included in Part 3. Specification Sections referenced in the schedule contain requirements for materials described under each unit price. No work outside of the scope of the List of Unit Prices shall be done at a cost to the government.

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PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 SCHEDULE OF UNIT PRICES

All measurements for unit price items shall be taken as described in Section 906 of “Standard Specifications for Construction of Trails and Trail Bridges on Forest Service Projects” (10/30/2014).

See below.

Section 906—Measurement and Payment

906.01 General. Measurement and payment for contract work will be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work and materials will be considered incidental and included in the payment of the PAY ITEMS in the SCHEDULE OF ITEMS.

When more than one class, size, or thickness is specified in the SCHEDULE OF ITEMS for any PAY ITEM, suffixes will be added to the item number to differentiate between the items.

906.02 Determination of Quantities. The following measurements and calculations are to be used to determine contract quantities for payment:

Make measurements for seeding, geotextiles, and erosion control blankets along slope lines.

For retaining walls, measure by the square foot of front wall face.

Measure structures according to neat lines SHOWN ON THE PLANS or as altered by the CO in writing to fit field conditions. Make measurements along the centerline and parallel to the specified grade or foundation or as SHOWN ON THE PLANS.

Deduct lengths for stairways, turnpike, puncheon, retaining walls, wire baskets, switchbacks, bridges, and bridge approaches from the measurement of excavation in Section 911 unless these items are specified as incidental to excavation in Section 911.

906.03 Units of Measurement. Payment will be made by units defined and determined according to U.S. Customary measure and by the following:

(a) Cubic Yard. A measurement computed by one of the following methods:

(1) Excavation, embankment, or borrow. The measurement computed by the average-end-area method from measurements made longitudinally along a centerline or other reference line.

(2) Material in place or stockpiled. The measurement computed with the dimensions of the in-place material using average-end-area method or prismodial formula.

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(b) Each (EA). One complete unit, which may consist of one or more parts.

(c) Lump Sum (LS). The quantities that denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job.

906.04 Methods of Measurement. One of the following methods of measurement for determining final payment is DESIGNATED ON THE SCHEDULE OF ITEMS for each

PAY ITEM:

(a) Actual Quantities (AQ). These quantities are determined from measurement of completed work.

A. Unit Price No. 1: Mobilization

Description: Mobilization shall include all activities and associated costs for transportation of Contractor's personnel, equipment, and operating supplies to the site. Only 1 mobilization per task order shall be payable. No work for this pay item shall commence without prior permission from CO/COR.

1. Payments for items such as demobilization, labor, installation, and any work related to the mobilization/demobilization shall be incidental to the unit price.

a. This work shall not include mobilization and demobilization for specific items of work for which payment is provided elsewhere in the contract.

b. Mobilization will not be considered as work in fulfilling the contract requirements for commencement of work.

2. Unit of Measurement: AQ Each execution of mobilization, as approved by CO/COR.

B. Unit Price No. 2, 3, 4, 5 & 6: Trail Construction – Green, Blue Type 1, Blue Type 2, Black Type 1, Black Type 2 Trail Construction.

Description: Construction of trail including necessary clearing and grubbing (912.10), brushing (912.20), excavation (911.00), and drain dips/grade reversals (927.10). See below excerpt from “Standard Specifications for Construction of Trails and Trail Bridges on Forest Service Projects” (10/30/2014).

911.10 - Excavation and Embankment

Description

911.10.01 This work consists of the excavation and placement of excavated material, regardless of its nature, from within the trailway or from other sources.

Includes excavation, embankment, and backfill construction required to shape and finish the trailbed, ditches, backslopes, fill slopes, drainage dips, trail passing sections, and turnouts. Also includes excavation and embankment work required to construct culverts, trail bridges, shallow stream fords and gully crossings, talus and rubble rock sections, and climbing turns.

Materials

911.10.02 Materials. Use materials meeting the requirements of the following sections:

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Rock, Grid Pavement Units, and Aggregate 991 Geosynthetics 994 Material for Timber Structures 995

Construction

911.10.03 Use and Disposal of Excavated Material. Conserve and use all suitable material for specified work. Conserve excess excavated rock suitable for specified project work and use in place of materials from designated sources.

Remove all duff and debris from within trailway limits and uniformly spread outside the clearing limits, not more than 4 inches in depth (unless otherwise SHOWN ON THE PLANS). Do not obstruct drainage or create piles, or windrows of debris.

Place excess and unsuitable excavation beyond the downslope edge of the trailbed.

Spread Forest Duff on disturbed areas that are not intended to be within the treadwidth. Do not obstruct drainage and spread to a uniform depth that will not allow the stability of the slope to be compromised. This includes any material removed in the grubbing operation and deposited in the same area.

Place rocks over 4 inches in greatest dimension not used in construction beyond the hinge point on the downslope side. Place rocks so that the tops are at least 6 inches lower than the trailbed surface. Ensure that no blockage of drainage or creation of a windrow effect occurs. Rocks may also be cached in a protected/stable uphill location for future construction use.

911.10.04 Trailway Excavation and Embankment. Trails shall be constructed within the flagged trail corridor as SHOWN ON THE PLANS.

Construct embankments with suitable compacted material. Utilize mechanical compaction to compact all disturbed soil within the trailbed area.

Remove any rock within or above the backslopes that is unstable. Use or dispose of rock in accordance with Subsection 912.03.

Leave the finished slope in a uniform and roughened condition.

Make necessary adjustments of horizontal or vertical alignment, within the tolerances specified in this subsection, to produce the designed trailway section and balance earthwork. Such adjustments shall not be considered as changes.

911.10.05 Trailbed Finish. Fill holes with suitable material, compact, and cut high points to provide a uniform trailbed finish. Tread widths specified ON THE

STANDARD DETAILS.

911.10.07 Ditches. Construct ditches to be free of loose rocks, roots, sticks, and other obstructions. Ditches to only be constructed at COR’s direction.

912.10 - Clearing and Grubbing

Description

912.10.01 This work consists of clearing, grubbing, trimming, removing, and treating trees, logs, limbs, branches, brush, plants, and other vegetation within the clearing limits. Work includes the felling and treatment of designated trees outside the clearing limits. Also, included are the protection from injury or defacement of trees and other objects not designated for removal and treatment of damaged trees.

912.10.02 Clearing Limits. Clear to the dimensions SHOWN ON THE PLANS or 12 inches beyond the fill and backslope catch points, whichever is greater.

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912.10.03 Material to Be Cleared. Remove and dispose of trees, logs, limbs, branches, brush, herbaceous plants, and other vegetation within the clearing limits, except for the following:

a) Live, sound, and firmly rooted trees of the size SHOWN ON THE PLANS.

b) Live brush, herbaceous plants, and trees between the trailway and the clearing limits that are less than 12 inches in height and less than ½ inch in diameter at ground line.

Except as provided above, cut all limbs and branches more than ½ inch in diameter that extend into the tread width. Cut limbs flush with the tree trunks or stems or cut at the ground surface.

Fall and limb designated trees. Remove no trees greater than 5” DBH.

912.10.04 Damaged Trees. When felling, cutting, or trimming, do not cause bark damage to standing timber. If damage does occur to standing trees, treat the injured trees as SHOWN ON THE PLANS. Remove and dispose of trees with major roots exposed by construction that are rendered unstable.

912.10.05 Removal of Stumps. Remove all stumps within the trailbed. Remove stumps located between the edge of the trailbed and the edge of the trailway that cannot be cut flush with the finished slope or that are not tightly rooted.

912.20 - Brush Cutting

912.20.01 This work consists of removing brush, trees less than 5 inches in diameter, and shrubs within the clearing limits.

Construction

912.20.02 General. Remove all limbs of shrubs and trees that extend across or into the tread width limits as SHOWN ON THE PLANS. Saw or cut limbs flush with the tree trunk. Make cuts in a manner that will not tear or strip bark from the trees.

Cut and remove from the tread width limits all woody plants exceeding ½ inch in stem diameter or 12 inches in height. The maximum size material to be cut under this specification is 5 inches in diameter when measured at a height of 6 inches above the ground on the uphill side of the stump.

Cut all brush and small, woody plants as near flush to the ground surface as possible. When impractical to cut plants flush, the maximum stem length shall be 2 inches.

Remove all woody material for a minimum of 3 inches below the trail tread surface.

Fill holes in the trail tread caused by removing woody material with suitable material.

Scatter the clearing debris removed from the clearing limits outside and below the clearing limits. Do not place materials in stream channels, drainage ways, ditches, culvert inlets, or other locations where they would prevent the free flow of water away from the trailbed.

927.10. - Drain Dip

Description

926.10.01 This work consists of constructing drain dips and associated drainage ditches, including excavation and backfill.

926.10.02 Construct drain dips as shown below:

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Side slopes greater than 40% - Every 75’, and at points of concentrated cross flow.

Side slopes less than 40% - Every 100’, and at points of concentrated cross flow.

Riprap drainage outlet on an as-need basis where erosion occurs at the drain dip.

927.20. - Drain Dip Maintenance

927.20.01 This work consists of maintenance of drain dips, including excavation and backfill, selecting and hauling of log and rock materials, and constructing catch basins, and headwalls.

Maintenance

927.20.02 General. Where trail drainage facilities have been plugged and the water has been diverted from the intended channel, remove the debris causing the diversion and return the drainage to the channel. Divert water off and away from the trailbed. If washing or ponding of water has been or is occurring, dig a shallow ditch sloped 2 percent to 5 percent to the downstream side of the trail and 3 inches minimum deep and 12 inches minimum wide across the trail at the point where water enters the trail.

Clean ditches to permit the free flow of water into culverts and away from the trail.

Scatter all unusable or unneeded material that is cleared from the drainage structures 3 feet or more beyond and below the trail or drainage facility and out of water courses.

927.20.03 Clean deposited material and restore drainage dips as SHOWN ON THE PLANS. Remove all debris from the lead-off area of dips that restricts the free flow of water away from the trail. Use suitable material obtained by cleaning dips for fill on the downgrade side, removing rock more than 3 inches at its greatest dimension. Compact all material placed in the trail tread.

1. Payments for items such as Labor, installation, equipment usage, clearing, grubbing, brushing, excavation, compaction, and drain dips and any work related to the installation of the trail bed/surface shall be incidental to the unit price.

2. Contractor responsible to report any hazard trees immediately to the COR, for Marlinton Ranger District Personnel evaluation/removal.

3. Unit of Measurement: AQ Linear Feet of constructed trail, measured along the centerline using a measuring wheel or approved device.

4. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in Section 012100 "Allowances."

C. Unit Price No. 7: Rock Armoring

Description: Construction of rock armored trail surface (913.50) for the purposes of drainage, tread stability, or to increase rugosity on technical sections. See below excerpt from “Standard Specifications for Construction of Trails and Trail Bridges on Forest Service Projects” (10/30/2014).

913.50 - Riprap Surfacing

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913.50.01 This work consists of construction of riprap surfacing, including excavation, furnishing, hauling, and placing rock and aggregate, compacting surfacing, and associated barriers, ditches, retaining walls, and approach sections.

Construction

913.50.02 Construct riprap surfacing as required under the construction section of 914.00. and/or as SHOWN ON THE PLANS

Rock armoring shall consist of native rock harvested during site work.

Caching of native stone during trail construction is permitted on the uphill side of the trail, so long as storage location is stable. Should native rock available be insufficient for rock armoring needs, notify COR to develop a suitable alternative plan.

For riprap/flagstone surfaces to be utilized as tread surface, maximum unavoidable vertical variation in surface of 2” for green, 8” for blue, and 12” for black rated trails shall be permitted.

Rock Armoring for stream approaches and crossings shall be included in this pay item.

Labor, installation, equipment usage, and any work related to the installation of the rock armoring shall be incidental to the unit price.

1. Unit of Measurement: AQ Square Feet of constructed rock armoring surface, measured as the average length multiplied by the average width of the feature.

1. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in

Section 012100 "Allowances."

D. Unit Price No. 8: Platform Turn

Description: Construction of platform turn, as defined by the typical construction detail on sheet C-01, and section 914.10. See below excerpt from “Standard Specifications for Construction of Trails and Trail Bridges on Forest Service Projects” (10/30/2014).

914 - Climbing Turn Description

914.00.01 This work consists of construction or maintenance of climbing turns, including excavation, furnishing, hauling, and placing rock and aggregate, compacting aggregate surfacing, and associated barriers, ditches, retaining walls, and approach sections. Construction or maintenance of the climbing turn may be covered by one or more of the following subsections:

914.10. Climbing Turn

914.20. Climbing Turn Maintenance

Construction

914.00.03 Preparation of Subgrade. Prepare and finish trailbed as required under section 911 and/or as SHOWN ON THE PLANS. Obtain written approval of the CO before placing aggregate.

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914.00.04 Retaining Walls. When SHOWN ON THE PLANS, construct retaining walls in accordance with section 935.

914.00.05 Barriers. When SHOWN ON THE PLANS, construct barriers at each climbing turn in accordance with section 933.

914.00.06 Ditches. When SHOWN ON THE PLANS, construct ditches in accordance with section 925.

Measurement

914.00.07 Measure the section 914 items listed in the bid schedule according to subsection 906.

Payment

914.00.08 The accepted quantities will be paid at the contract price per unit of measurement for the section 914 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this section. See Subsection 906.04.

914.10 - Climbing Turn Description

914.10.01 This work consists of construction of climbing turns, including excavation, furnishing, hauling, and placing rock and aggregate, compacting aggregate surfacing, and associated barriers, ditches, retaining walls, and approach sections.

Construction

914.10.02 Construct climbing turn as required under the construction section of

914.00. and/or as SHOWN ON THE PLANS.

1. Reference drawings for typical details.

2. Labor, materials, installation, equipment usage, and any work related to the installation of the turn shall be incidental to the unit price.

3. Unit of Measurement: AQ Quantity of turn type installed on segment(s) in contract scope.

4. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in

Section 012100 "Allowances."

E. Unit Price No. 9: In-sloped Turn

1. Description: Construction of in-sloped turn (climbing turn, 914.10). Reference Sections

914.00 & 914.10 in Unit Price No. 8.

2. For In-sloped turn, turns shall have in-slope of 5-35% through the turn radius. For approaches and grade reversals, reference STD_914_10. Reference drawings for typical details.

3. Labor, materials, installation, equipment usage, and any work related to the installation of the turn shall be incidental to the unit price.

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4. Unit of Measurement: AQ Quantity of turn type installed on segment(s) in contract scope.

5. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in

Section 012100 "Allowances."

F. Unit Price No. 10: Stacked Rock Retaining Wall

Description: Installation of stacked rock retaining wall (STD_935-20-01, 935.20) for the purposes of avoiding root systems, counteracting steep cross slopes, or other. See below excerpt from “Standard Specifications for Construction of Trails and Trail Bridges on Forest Service Projects” (10/30/2014).

935.20 - Stacked Rock Retaining Wall Description

935.20.01 This work consists of constructing stacked rock retaining walls, including excavating, placing borrow, backfilling, tread and slope finishing.

Construction

935.20.02 Install retaining walls as required under construction section 935.00.

and/or as SHOWN ON THE PLANS.

935.20.03 Wall Construction. Construct rock retaining walls at locations SHOWN ON THE PLANS and DESIGNATED ON THE GROUND. Stagger vertical joints a minimum of 4 inches horizontally from vertical joints in adjoining courses.

Use uniformly distributed header rocks for at least 25 percent of the rocks in the front and rear faces of the wall each having a length at least 2.5 times its width.

Place all header rocks with the greatest dimension extending into the wall (at right angle to trail centerline), except at corners. At corners, lay alternating courses containing headers with greatest dimension parallel with wall.

Place the exposed face of each rock parallel to the face of the wall in which it is set.

Stabilize each rock on the course that supports it. Do not break, loosen, or displace rocks already set.

Use rocks of a general rectangular shape. Fill internal voids with small rock fragments or fine aggregate.

1. Labor, installation, equipment usage, and any work related to the installation of the wall shall be incidental to the unit price.

2. Unit of Measurement: AQ Square feet of exposed face of wall, as measured on one side only.

3. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in Section 012100 "Allowances."

G. Unit Price No. 11: Jute Fiber Log, Erosion and Sediment Control

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1. Description: Installation of Erosion and Sediment Control

a. Erosion and Sediment Control to be installed per the Typical drawing on sheet

STD_917-10-01.

b. Jute Fiber Log to be utilized and installed at shown on the plans. Upon final stabilization of segment, Jute Fiber Log shall remain in place to bio-degrade.

c. Labor, installation, equipment usage, permitting, and any work related to the installation of the wall shall be the responsibility of the contractor, and incidental to the unit price.

2. Unit of Measurement: AQ Linear feet of Jute Fiber Log installed.

3. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in

Section 012100 "Allowances."

H. Unit Price No. 12: Riprap Energy Dissipator

1. Description: Installation of Riprap for the purposes of dissipating hydraulic energy in concentrated flows.

a. Riprap Energy Dissipator to be installed per the Typical drawing on sheet STD_927-

10-01.

b. Riprap to be installed with maximum rugosity to aid with energy dissipation.

c. Labor, installation, equipment usage, permitting, and any work related to the installation of the riprap shall be the responsibility of the contractor, and incidental to the unit price.

2. Unit of Measurement: AQ Square feet of riprap dissipation installed, measured in the field.

3. Quantity Allowance: Coordinate unit price with allowance adjustment requirements in

Section 012100 "Allowances."

END OF SECTION 012200

017100 – WEED AND DISEASE PREVENTION

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SECTION 017100 - WEED AND DISEASE PREVENTION

PART 1 - GENERAL

1.1 SUMMARY

A. This work consists of washing and treating construction equipment to remove seeds, plants, and plant fragments from the equipment before the equipment is used on National Forest System lands.

PART 2 - PRODUCTS

2.1 WATER

A. Free of debris, organic matter, and other objectionable substances.

PART 3 - EXECUTION

3.1 GENERAL

A. Notify the COR in writing at least 10 calendar days before moving any construction equipment onto National Forest System lands. Construction equipment does not include cars, pickup trucks, and other vehicles that regularly travel between the construction site and areas outside of National Forest System lands.

B. Perform all work at a location designated on the plans or other locations approved in writing. Provide the COR with an opportunity to monitor the washing and inspection.

3.2 EQUIPMENT

A. Use a high pressure washing system.

B. For work on National Forest System lands, use a washing system that traps all wash water and either stores it for removal from National Forest System lands or recycles the water for continued use. If the equipment recycles the water, provide adequate filters for seed removal. Dispose of the filter material and removed seeds in an approved manner. Do not mix soaps, detergents, or other chemicals with the wash water.

C. For work at a commercial washing facility, use an approved facility.

3.3 WASHING

A. Wash the sides, tops, and undercarriages of all construction equipment. Remove all seeds, plants, plant fragments, dirt, and debris from the construction equipment.

017100 – WEED AND DISEASE PREVENTION

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3.4 INSPECTION

A. Inspect the washed construction equipment, including the undercarriage, to ensure that the washing removed the dirt, debris, and seeds from the construction equipment.

Rewash the construction equipment as necessary or as directed.

END OF SECTION 017100